| ZHOU Si-hu,CHAO Ming-ju,LIU Kui-li,GUO Yan-hua.Research on In-situ Synthesis of WC-B4C Reinforced Ni-based Coatings by Laser Cladding[J],43(3):25-30 |
| Research on In-situ Synthesis of WC-B4C Reinforced Ni-based Coatings by Laser Cladding |
| Received:December 24, 2013 Revised:January 21, 2014 |
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| DOI： |
| KeyWord:laser cladding in-situ synthesized WC-B4C microstructure wear resistance |
| Author | Institution |
| ZHOU Si-hu |
Department of Physics,Engineering Zhengzhou University, Zhengzhou , China;Department of Physics and Electronic Engineering, Zhoukou Normal University, Zhoukou , China |
| CHAO Ming-ju |
Department of Physics,Engineering Zhengzhou University, Zhengzhou , China |
| LIU Kui-li |
Department of Physics and Electronic Engineering, Zhoukou Normal University, Zhoukou , China |
| GUO Yan-hua |
Department of Physics and Electronic Engineering, Zhoukou Normal University, Zhoukou , China |
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| Abstract: |
| Objective To in-situ synthesize WC-B4C reinforced Ni-based composite coating on the surface of steel Q235 substrate using laser cladding technique. Methods Using WO3, B2O3, C and Ni60 as pre-coating raw materials, in-situ WC-B4C reinforced Ni-based composite coating was synthesized by laser cladding technology. The microstructure observation, component and phases analysis of the coatings were performed to analyze the friction and wear resistance performance. Results The results indicated that a good finish WC-B4C particulate reinforced composite coating could be achieved by proper laser cladding processes. The coatings epitaxial growing from the substrate with excellent bonding between the coating and substrate was assured by the strong metallurgical interface. The in situ synthesized WC-B4C particulate reinforced Ni-based composite coating had very high hardness of 1200HV0. 3, and excellent wear resistance which was only 1 / 3 that of pure Ni60 coatings. Conclusion The coating layer had improved hardness and wear resistance, which was due to the in-situ synthesis of WC-B4C and its homogenous distribution in the cladding layer. |
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